fix(encoding): 移除所有UTF-8 BOM - api.js + 3个shop页面

根源: utils/api.js含UTF-8 BOM导致编译时引入乱码到cognitive-report.wxss
已清理: unpackage/dist所有缓存，强制重新编译

cfc-frontend/pages/shop/detail/detail.vue

@@ -1,4 +1,4 @@
-<template>
+<template>
   <view class="container">
     <view v-if="loading" class="loading-wrap">
       <text class="loading-text">加载中...</text>

cfc-frontend/pages/shop/order-detail/order-detail.vue

@@ -1,4 +1,4 @@
-<template>
+<template>
   <view class="container">
     <view v-if="loading" class="loading-wrap">
       <text class="loading-text">加载中...</text>

cfc-frontend/pages/shop/order-list/order-list.vue

@@ -1,4 +1,4 @@
-<template>
+<template>
   <view class="container">
     <view class="status-tabs">
       <view

cfc-frontend/utils/api.js

@@ -1,4 +1,4 @@
-import config from '@/config.js'
+import config from '@/config.js'
 
 const BASE_URL = config.API_BASE_URL